This specification specifies the welding construction requirements for carbon steel and low alloy steel pipe welds in high hydrogen sulfide (HS) natural gas pipeline transportation systems in the oil and gas industry. This specification is applicable to the welding construction of natural gas transmission pipelines with a volume fraction of HS in natural gas greater than or equal to 5%. This specification does not replace other technical standards and specifications related to the welding of process pipelines for natural gas gathering and transportation and purification equipment.
SY/T 4117-2010 Referenced Document
GB/T 20972.1 Petroleum and natural gas industries- Material for use in HS-containing environments in oil and gas production- Part 1: General principles for selection of cracking-resistant materials
GB/T 20972.2 Petroleum and natural gas industries.Materials for use in HS-containing environments in oil and gas production.Part 2:Cracking-resistant carbon and low alloy steels,and the use of cast irons
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 2650 Destructive tests on welds in metallic materials—Impact tests*， 2022-10-12 Update
GB/T 2651 Destructive testing of welds on metallic materials Transverse tensile testing*， 2023-05-23 Update
GB/T 4157 Laboratory testing of metals for resistance to sulfide stress cracking and stress corrosion cracking in H2S environment*， 2017-09-29 Update
GB/T 4336 Determination of multi-element content in carbon steel and medium and low alloy steel Spark discharge atomic emission spectrometry (conventional method) Amendment No. 1